Board Thread:Pokémon Help/@comment-32228622-20170614153355/@comment-5427970-20170615205401

Mega Steelix and Mega Gengar are used for different purposes

Mega Gengar if you wanna be complete uber meta trash, or you just want an annoying Special Wallbreaker, or Destiny Bond, or just a load of coverage, While also being able to trap annoying pokemon battlles

Mega Steelix if you want an extreme Defensive Tank, who can set stealth rocks easily, use a load of status moves, Or even deal heavy damage to a wide variety of weakly defensive pokemon.